app.js

const path = require('path');
const express = require('express');

const bodyParser = require('body-parser');
const mongoose = require('./config/index');
const multer = require('multer');

const feedRoutes = require('./routes/feed');
const authRoutes = require('./routes/auth');

const app = express();

const fileStorage = multer.diskStorage({
    destination: (req, res, next) => {
        cb(null, 'images');
    },
    filename: (req, file, next) => {
        cb(null, new Date().toISOString() + '-' + file.originalname)
    }
})

const fileFilter = (req, file, cb) => {
    if (file.mimetype === 'image/png' || file.mimetype === 'image/jpg' || file.mimetype === 'image/jpeg') {
        cb(null, true);
    } else {
        cb(null, false);
    }
}

app.use(bodyParser.json());
app.use(multer({
    storage: fileStorage,
    fileFilter: fileFilter
}).single('image'))
app.use('/images', express.static(path.join(__dirname, 'images')));

app.use((req, res, next) => {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', '*');
    res.setHeader('Access-Control-Allow-Headers', 'Content-Type', 'Authorization');
    next();
})

app.use('/feed', feedRoutes);
app.use('/auth', authRoutes);

app.use((error, req, res, next) => {
    console.log(error);
    const status = error.statusCode || 500;
    const message = error.message;
    const data = error.data;
    res.status(status).json({message: message, data: data});
})

mongoose.connect();

app.listen(3000)